31312312319 has 2 divisors, whose sum is σ = 31312312320. Its totient is φ = 31312312318.

The previous prime is 31312312261. The next prime is 31312312333. The reversal of 31312312319 is 91321321313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31312312319 - 2⁸ = 31312312063 is a prime.

It is a super-2 number, since 2×31312312319² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31312312291 and 31312312300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31312312219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656156159 + 15656156160.

It is an arithmetic number, because the mean of its divisors is an integer number (15656156160).

Almost surely, 2^31312312319 is an apocalyptic number.

31312312319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312312319 is an equidigital number, since it uses as much as digits as its factorization.

31312312319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The spelling of 31312312319 in words is "thirty-one billion, three hundred twelve million, three hundred twelve thousand, three hundred nineteen".